Source for 7.65×53mm Argentine?
- Thread starter Pblatzz
- Start date
Making obsolete or little used calibre cases is quite possible and reasonable by starting with a readily available case.
It is very easy to make some cases simply by running them through a set of reloading dies, and ending up with useable cases for reloading. In some instances you might have to trim them, fire form them, or other operation. A set of reloading dies for these obsolete or obsolescent calibres are generally more expense than the "regular" calibres, but that is because of the demand for them and these dies are produced in small runs each time. LEE has done some good work in this case with many "odd" calibres at reasonable prices. In some cases, special sets of forming dies will have to be purchased.
Sometimes a regular set of dies can be used to make undrsized cartridges that will fit into the rifle chamber, and when loaded with a fire forming load such as 10 grains of 2400 powder, a case full of corn meal and a toilet paper wad, will form a case to chamber dimensions and after firing can be trimmed to proper length and size.
In the case of the 7.65 Argentine, chosing as close as possible case for the conversion is better because it decreases the number of operations that have to be done. If we use something like the 8x57 Mauser rather than the 30-06 Springfield case, the 8x57 we start by removing the decapping pin assembly in the resizing die to prevent crumbling of the case. After resizing, we trim the case to length, then put the decaping pin assembly back in the die, and can load a light load and fire form it.
With the 30-06 case, it is 62 mm long instead of 57 mm long. This means the NECK of the 7.65 case formed will be thicker, and after trimming it should be reamed inside (or outside depending upon your trimmer) to get the proper neck thickness and reduce pressures.
There is a thick book available, "The Reloaders Guide to Cartridge Conversions" that gives a lot of information on this subject. In some cases, the case used by the Author of this book uses a obtainable case, but some better cases are more suitable. Another much older book, by George Nonte, is "Cartridge Conversions." It is out of print decades ago, but if you have a chance to get a copy, and you load "unusual" calibres, it is well worth it.
It is very easy to make some cases simply by running them through a set of reloading dies, and ending up with useable cases for reloading. In some instances you might have to trim them, fire form them, or other operation. A set of reloading dies for these obsolete or obsolescent calibres are generally more expense than the "regular" calibres, but that is because of the demand for them and these dies are produced in small runs each time. LEE has done some good work in this case with many "odd" calibres at reasonable prices. In some cases, special sets of forming dies will have to be purchased.
Sometimes a regular set of dies can be used to make undrsized cartridges that will fit into the rifle chamber, and when loaded with a fire forming load such as 10 grains of 2400 powder, a case full of corn meal and a toilet paper wad, will form a case to chamber dimensions and after firing can be trimmed to proper length and size.
In the case of the 7.65 Argentine, chosing as close as possible case for the conversion is better because it decreases the number of operations that have to be done. If we use something like the 8x57 Mauser rather than the 30-06 Springfield case, the 8x57 we start by removing the decapping pin assembly in the resizing die to prevent crumbling of the case. After resizing, we trim the case to length, then put the decaping pin assembly back in the die, and can load a light load and fire form it.
With the 30-06 case, it is 62 mm long instead of 57 mm long. This means the NECK of the 7.65 case formed will be thicker, and after trimming it should be reamed inside (or outside depending upon your trimmer) to get the proper neck thickness and reduce pressures.
There is a thick book available, "The Reloaders Guide to Cartridge Conversions" that gives a lot of information on this subject. In some cases, the case used by the Author of this book uses a obtainable case, but some better cases are more suitable. Another much older book, by George Nonte, is "Cartridge Conversions." It is out of print decades ago, but if you have a chance to get a copy, and you load "unusual" calibres, it is well worth it.
